diff --git a/hutool-core/src/main/java/cn/hutool/core/net/NetUtil.java b/hutool-core/src/main/java/cn/hutool/core/net/NetUtil.java
index ecebe74b6..65e521342 100644
--- a/hutool-core/src/main/java/cn/hutool/core/net/NetUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/net/NetUtil.java
@@ -702,7 +702,7 @@ public class NetUtil {
 		String[] ips = StrUtil.splitToArray(ip, '.');
 		int ipAddr = (Integer.parseInt(ips[0]) << 24) | (Integer.parseInt(ips[1]) << 16) | (Integer.parseInt(ips[2]) << 8) | Integer.parseInt(ips[3]);
 		int type = Integer.parseInt(cidr.replaceAll(".*/", ""));
-		int mask = 0xFFFFFFFF << (32 - type);
+		int mask = (int)((-1L << 32 - type) & 0XFFFFFFFF);
 		String cidrIp = cidr.replaceAll("/.*", "");
 		String[] cidrIps = cidrIp.split("\\.");
 		int cidrIpAddr = (Integer.parseInt(cidrIps[0]) << 24) | (Integer.parseInt(cidrIps[1]) << 16) | (Integer.parseInt(cidrIps[2]) << 8) | Integer.parseInt(cidrIps[3]);
diff --git a/hutool-core/src/test/java/cn/hutool/core/net/NetUtilTest.java b/hutool-core/src/test/java/cn/hutool/core/net/NetUtilTest.java
index ff467456a..0bed82723 100644
--- a/hutool-core/src/test/java/cn/hutool/core/net/NetUtilTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/net/NetUtilTest.java
@@ -101,4 +101,15 @@ public class NetUtilTest {
 		Console.log(txt);
 	}
 
+	@Test
+	public void isInRangeTest(){
+		Assert.assertTrue(NetUtil.isInRange("114.114.114.114","0.0.0.0/0"));
+		Assert.assertTrue(NetUtil.isInRange("192.168.3.4","192.0.0.0/8"));
+		Assert.assertTrue(NetUtil.isInRange("192.168.3.4","192.168.0.0/16"));
+		Assert.assertTrue(NetUtil.isInRange("192.168.3.4","192.168.3.0/24"));
+		Assert.assertTrue(NetUtil.isInRange("192.168.3.4","192.168.3.4/32"));
+		Assert.assertFalse(NetUtil.isInRange("8.8.8.8","192.0.0.0/8"));
+		Assert.assertFalse(NetUtil.isInRange("114.114.114.114","192.168.3.4/32"));
+	}
+
 }